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ASPxGridView - The CheckedChanged event does not fire when ASPxCheckBox is placed inside DataItemTemplate

created 7 years ago (modified 7 years ago)

I am having ASPxGridview with checkbox column.,

ASPx
<dx:ASPxGridView ID="gridChecklist" runat="server" ClientInstanceName="gridChkLst" OnCustomColumnDisplayText="grid_CustomColumnDisplayText"  
                                AutoGenerateColumns="false" OnCustomCallback="gridChecklist_CustomCallback" KeyFieldName="ChecklistID">  
                            <Settings AutoFilterCondition="Contains" ShowHeaderFilterButton="true" ShowFilterRow="True" />  
                            <SettingsDataSecurity AllowDelete="False" AllowEdit="False" AllowInsert="False" />  
                            <SettingsSearchPanel Visible="True" />  

                                <Columns>  
                                    <dx:GridViewDataTextColumn FieldName="ChecklistID" Visible="false"  Width="10" Name="colId" VisibleIndex="1"></dx:GridViewDataTextColumn>  
                                    <dx:GridViewDataTextColumn FieldName="AuditType" VisibleIndex="2" Width="200" Caption="Audit Type" Name="colAudTp"></dx:GridViewDataTextColumn>  
                                    <dx:GridViewDataTextColumn FieldName="ChecklistType" VisibleIndex="3" Width="200" Caption="Checklist Type" Name="colChkTp"></dx:GridViewDataTextColumn>  
                                    <dx:GridViewDataTextColumn FieldName="ChecklistName" VisibleIndex="4" Width="400" Caption="Checklist Name" Name="colChkNm"></dx:GridViewDataTextColumn>  




                                    <<strong>dx:GridViewDataCheckColumn FieldName="StatusID" Caption="Active/Inactive" VisibleIndex="5" Name="colStat">  
                                        <DataItemTemplate>  
                                            <dx:ASPxCheckBox ID="cbStatus" runat="server"  Value='<%# Bind("StatusID") %>' ValueType="System.Int64" ValueChecked="1" ValueUnchecked="0"  
                                                 OnCheckedChanged="cbStatus_checkedChanged">  

                                            </dx:ASPxCheckBox>  
                                        </DataItemTemplate>  
                                    </dx:GridViewDataCheckColumn></strong>  



                                    <dx:GridViewCommandColumn ShowNewButton="true" ShowEditButton="true" VisibleIndex="9" ButtonRenderMode="Image" Caption="Edit" Name="col_Edit">  
                                        <CustomButtons>  
                                            <dx:GridViewCommandColumnCustomButton ID="colEdit">  
                                                <Image ToolTip="Edit" Url="~/Images/edit_icon.png"></Image>  
                                            </dx:GridViewCommandColumnCustomButton>  
                                        </CustomButtons>  
                                    </dx:GridViewCommandColumn>  
                                    <dx:GridViewCommandColumn ShowNewButton="true" ShowEditButton="true" VisibleIndex="10" ButtonRenderMode="Image" Caption="Delete" Name="col_Del">  
                                        <CustomButtons>  
                                            <dx:GridViewCommandColumnCustomButton ID="colDel">  
                                                <Image ToolTip="Delete" Url="~/Images/close_icon.png"></Image>  
                                            </dx:GridViewCommandColumnCustomButton>  
                                        </CustomButtons>  
                                    </dx:GridViewCommandColumn>  
                                    <dx:GridViewCommandColumn ShowNewButton="true" ShowEditButton="true" VisibleIndex="11" ButtonRenderMode="Image" Caption="Copy" Name="col_Copy">  
                                        <CustomButtons>  
                                            <dx:GridViewCommandColumnCustomButton ID="colCopy">  
                                                <Image ToolTip="Copy" Url="~/Images/Copy_Theme.png"></Image>  
                                            </dx:GridViewCommandColumnCustomButton>  
                                        </CustomButtons>  
                                    </dx:GridViewCommandColumn>  
                                    <dx:GridViewDataTextColumn Caption="S/N" UnboundType="Integer" VisibleIndex="0" Name="SN">  
                                    </dx:GridViewDataTextColumn>  

                                </Columns>  
                                <ClientSideEvents CustomButtonClick="OnCustomButtonClick" />  
                            </dx:ASPxGridView>

My .cs page,

C#
protected void cbStatus_checkedChanged(object sender, EventArgs e)  
        {  
            ASPxCheckBox cbChkBox = sender as ASPxCheckBox;  
            GridViewDataItemTemplateContainer container = cbChkBox.NamingContainer as GridViewDataItemTemplateContainer;  
            String chkLstid;  
            chkLstid = container.KeyValue.ToString();  
        }

I am binding gridview like,

gridChecklist.DataSource = SessionChecklistListing;   //data table
 gridChecklist.DataBind();

What's wrong in this?

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Answers approved by DevExpress Support

created 7 years ago (modified 7 years ago)

Hello Harshada,

The issue is related to the fact that it is necessary to set the AutoPostBack property to true to allow our CheckBox to trigger a postback request:

ASPx
<dx:ASPxCheckBox AutoPostBack="true">  
</dx:ASPxCheckBox>

Let me know if you have further questions.

    Comments (3)
    HJ HJ
    Harshada J 7 years ago 
      C#
      It's contradicting to page_load()

      In page load i am binding the grid.

      gridChecklist.DataSource = SessionChecklistListing;   //data table
       gridChecklist.DataBind();

      It do post back now and checkbox event fires but again due to page_load it checks the checkbox.
      If I write,

      C#
      if (!IsPostBack)  
 {  
     BindChecklist();  
 }

      Then after changing page, grid won't load.

      So If I write in OnInit()

      C#
      protected override void OnInit(EventArgs e)  
 {  
     base.OnInit(e);  
     BindChecklist();  
 }

      Will it be a problem?
      Now it's working but I am afraid whether it's correct logic or not?

      Lanette (DevExpress Support) 7 years ago

        Hello,

        The problem may occur if you're setting checkbox values in the Page_Load event handler because this event fires after restoring these checkbox values from post data and as a result, your custom code checks these checkboxes and resets the selection made by a user. As I understand from your previous comment, the issue is resolved when you're setting these checkbox values in the Page_Init event handler. In general, I don't see any potential problems in this approach. Let us know if you have further difficulties with this scenario and provide us with a sample runnable project where we can reproduce them.

        HJ HJ
        Harshada J 7 years ago

          OK Noted. Thanks.
          Will let you know if any problem comes.

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